Category "etherscan"

Retrieving swapped token addresses from etherscan using web3js

I am trying to retrieve the token addresses of tokens swapped (and amount of tokens swapped) in a single transaction. I am using the "web3.eth.get_transaction(h

Solidity - Invalid BigNumber string (argument="value" value="" code=INVALID_ARGUMENT version=bignumber/5.4.2) Error

Smart Marketplace Contract: allow user to list the erc20 tokens to sell at what price in matic the buyers need to provide permission to the contract to interac

Verify and Publish Contract on Etherscan with Imported OpenZeppelin file

I'm currently building a ERC721 compliant contract and have published the contract here: https://ropsten.etherscan.io/address/0xa513bc0a0d3af384fefcd8bbc1cc0c97

Is possible to see output data when tracking a transaction from its address on Etherscan?

I wonder if it is possible to see "Output Data" on Etherscan for non-view transactions that returned values, I mean it is possible to see "Input Data" when fetc

Verify the contract from a contract factory

I am learning about web3 and using web3-react, ethers and hardhat. I made a contract, and I want that every user deploys their own Contract. The Contract is dep

Error in plugin @nomiclabs/hardhat-etherscan: The contract verification failed. Reason: Fail - Unable to verify - with arguments

I am trying to verify my contract with arguments and I am getting this error: Error in plugin @nomiclabs/hardhat-etherscan: The contract verification failed. Re